How do u ask other male friends if they are cut or uncut, without sounding bad?

What I did at one time was like are you cut or uncut. There was a group of like 12 of us, and maybe like 6 girls and we just all got really into it. Nobody made fun of each other and some of the people started to ask other questions like what does it feel like having a foreskin. We did this at school. And I thought it went over pretty well so yea.